DM 42

[Ángel Martin]

(05-24-2017 06:42 PM)Guenter Schink Wrote:  I think the DM42 also uses this library, perhaps this explains something, I don't know what is correct.

sorry to be blunt but this is math, and thus pretty rigid as to which one is the correct result.
You can check WolframAlpha if that adds more weight to the "credibility of options":

http://www.wolframalpha.com/input/?i=asi...2B0i))))))

Logan is correct, the "glitch" occurs in the ATAN function.